Anthropic employees could be asked to sell shares through pre-arranged trading plans if the company proceeds with its reported November IPO. The practical consequence is that staff may need to make tax, liquidity and diversification decisions before they know how the public market will value the Claude maker. A rather less glamorous side of the AI boom, but one with very real consequences.
Anthropic Watch analysis
What happened
Forbes reports that Anthropic is considering requiring employees to use 10b5-1 trading plans after an IPO. Those plans set out in advance how many shares an employee will sell, and when or at what price, helping people trade without making decisions while holding material non-public information. The proposal has not been finalised.
The report says employees could also be allowed to sell some shares around the IPO while facing a longer-than-usual lock-up on the remainder. Anthropic has not been reported as having confirmed those arrangements. The article links the possible policy to reporting from The Information and the company’s reported plans for a November listing at a valuation of roughly $2 trillion.
For employees holding double-trigger restricted stock units, an IPO can also create a tax bill when shares vest and become liquid. Forbes says those shares would generally be taxed as ordinary income at their value on the IPO date, although individual treatment depends on the person’s circumstances and jurisdiction.
Why it matters
A soaring private valuation can make an employee wealthy on paper while leaving most of that wealth tied to one company. A mandatory or strongly encouraged trading schedule could make diversification more orderly, but it would also reduce flexibility at precisely the moment when prices, tax obligations and personal finances may be moving together.
The bigger story is that frontier AI companies are becoming financial systems as well as software companies. Their model releases attract the headlines, while equity rules determine who can actually turn the boom into usable wealth. The spreadsheet has arrived at the frontier lab, wearing sensible shoes.
Our read
The important claim here is not that Anthropic has adopted a 10b5-1 requirement. It has not, according to the supplied report. It is that a possible IPO is forcing employees to plan around decisions that could become irreversible once a trading plan, tax bill or lock-up is in place.
Employees should treat the reported arrangements as unconfirmed and seek qualified tax or financial advice rather than treating a news article as a personal plan. Investors, meanwhile, should watch for the filing and its actual treatment of employee liquidity. A $2 trillion headline is impressive; the rules governing who can sell, when and why may tell us more about the company’s maturity.
What to watch
- The IPO filing
Whether Anthropic confirms a November timetable, valuation range and share-sale restrictions. - Employee trading rules
Whether 10b5-1 plans become mandatory, recommended or remain under discussion. - Lock-up terms
Whether employees can sell at listing or face staged releases over a longer period. - Tax treatment
How the company handles withholding and employee communications when equity vests. Sources and evidence Forbes published the report on 22 September 2026, based in part on reporting attributed to The Information and the Wall Street Journal. The supplied copy is an archived snapshot rather than a successful live-page fetch, and the possible employee policy remains unconfirmed.
Discussion spark: Should fast-growing private technology companies be allowed to require employees to pre-schedule share sales, or does that unfairly take control away from the people whose work created the value?
Sources and evidence
- Anthropic IPO: What 10b5-1 Plans Mean For Employees – Forbes (22 September 2026, 20:28 UTC)
Anthropic Watch is independently operated by WittyWires. It is not affiliated with, endorsed by, or operated by Anthropic.